CN110347264A - Deformation unit, display panel and driving circuit for touch feedback - Google Patents
Deformation unit, display panel and driving circuit for touch feedback Download PDFInfo
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- CN110347264A CN110347264A CN201910649563.6A CN201910649563A CN110347264A CN 110347264 A CN110347264 A CN 110347264A CN 201910649563 A CN201910649563 A CN 201910649563A CN 110347264 A CN110347264 A CN 110347264A
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- display panel
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
Abstract
This application discloses a kind of deformation unit, display panel and driving circuits for touch feedback.This is used for the deformation unit of touch feedback, including substrate, the first supporting element, the second supporting element, deformation part, first electrode and second electrode, deformation part is parallel to substrate between the first supporting element and the second supporting element, is air interlayer between deformation part and substrate；Under the action of the electric field that first electrode and second electrode are formed, deformation occurs for deformation part, and deformation part uses piezoelectric material.
Description
Technical field
The present disclosure relates generally to haptic feedback technology fields, more particularly, to deformation unit, the display surface of touch feedback
Plate and driving circuit.
Background technique
More and more scientific research personnel are dedicated to the research of haptic feedback technology now, have developed a variety of for two-dimensional screen
Feedback technique, mainly include such as deformation, electrostatic force, vibration, electro photoluminescence, piezoelectricity.Haptic feedback devices are according to user's finger
Position provides effective haptic excitation of corresponding display object for user；Rendering is with generating algorithm by extracting display interactive interface
Image texture is mapped to obtain driving signal with the interaction models of hand, and is sent to haptic feedback devices and is generated excitation completion
Tactile data rendering；On the basis of realizing haptic feedback technology, completed after optimization haptic feedback process true to interaction
Sense is promoted.Various haptic feedback technologies have unique advantage and technical characterstic, but simultaneously again there are some technical deficiencies,
Main problem concentrates on can not merging with screen, algorithm is complicated, hardware requirement is high and is not easy to realize, these technological deficiencies affect
Approval of the user to haptic feedback technology, limitation haptic feedback technology are applied in screen.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, it is intended to provide a kind of touch feedback that structure is simply easily achieved
Deformation unit, display panel and driving circuit.
In a first aspect, providing a kind of deformation unit for touch feedback, unit includes substrate, the first supporting element, second
Supporting element, deformation part, first electrode and second electrode,
Deformation part is parallel to substrate between the first supporting element and the second supporting element, is empty between deformation part and substrate
Air casing；
Under the action of the electric field that first electrode and second electrode are formed, deformation occurs for deformation part, and deformation part uses piezoelectricity
Material.
Further, first electrode is set to the first supporting element close to the side of deformation part；
Second electrode is set to the second supporting element close to the side of deformation part.
Further, first electrode is set to side of the deformation part far from substrate；
Second electrode is set to substrate close to the side of deformation part.
Second aspect provides a kind of display panel, including substrate, backboard and several pixels being formed on backboard
Unit further includes any deformation unit for touch feedback of several claims 1-3；
Deformation unit is arranged on pixel unit correspondingly.
Further, pixel unit includes at least a glowing device, and glowing device includes first electrode and the
Two electrodes；
Substrate of the second electrode of glowing device as deformation unit；
The second electrode of deformation unit and the second electrode of electroluminescent device connect；
The first electrode of deformation unit is connect with backboard
The second electrode of electroluminescent device is cathode.
The third aspect provides a kind of driving circuit applied to display panel, and display panel includes pixel-driving circuit, also
Including driving unit and holding unit,
Driving unit connects the pixel-driving circuit of any electroluminescent device where deformation unit, and and holding unit
Connection, when electroluminescent device is effective, electric energy is input to holding unit by driving unit；
Holding unit receives the electric energy that driving unit is sent, and drives deformation unit deformation occurs.
Further, driving unit includes deformation driving transistor, and deformation drives the grid of transistor to connect electroluminescent cell
The first electrode of part, first electrode connect the first supply voltage, and second electrode connects holding unit.
Further, holding unit includes the first storage capacitance, and the first electrode connection deformation driving of the first storage capacitance is brilliant
The second electrode of body pipe and the first electrode of deformation unit, the second electrode of third power supply voltage and deformation unit.
Further, pixel-driving circuit includes shining to drive transistor, electroluminescent device and the second storage capacitance,
It shines and the grid of transistor is driven to receive display data, first electrode is connect with second source voltage, second electrode
It is connect with the first electrode of electroluminescent device；
The second electrode of electroluminescent device is grounded；
The first electrode of second storage capacitance is connect with the grid for the driving transistor that shines, second electrode and electroluminescent cell
The first electrode of part connects；
The first electrode of electroluminescent device is connect with the grid for the driving transistor that shines.
Fourth aspect provides a kind of driving circuit applied to display panel, including driving unit, holding unit,
Driving unit receives row scan data and deformation data, and connect with holding unit, when line scan signals are effective,
Deformation data is input to holding unit；
Holding unit, receives the electric energy of driving unit, and drives deformation unit deformation occurs.
Further, driving unit includes deformation driving transistor, and deformation drives the grid of transistor to connect line scan signals,
First electrode connects deformation signal, and second electrode connects holding unit.
Further, holding unit includes the first storage capacitance, the first electrode connection driving transistor of the first storage capacitance
Second electrode and deformation unit first electrode, second electrode connects the second electricity of third power supply voltage and deformation unit
Pole.
According to technical solution provided by the embodiments of the present application, the deformation part of supporting element, the shape are fixed on by using both ends
Become the deformation unit that part and substrate have air interlayer, a kind of a kind of touch feedback deformation of piezoelectric material as deformation part is provided
Unit.Further, according to some embodiments of the application, by the way that touch feedback deformation unit is set to each pixel list
Member provides a kind of structure merged with display panel, can solve the big problem of the power consumption of conventional haptic feedback system, obtains
Energy-efficient effect.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 shows the exemplary block diagram of the deformation unit for touch feedback according to the embodiment of the present application；
Fig. 2 shows the exemplary block diagrams of deformation part 14 in Fig. 1；
Fig. 3 shows the exemplary structure frame of the deformation unit for touch feedback according to the another embodiment of the application
Figure；
Fig. 4 shows the exemplary block diagram of deformation part 14 in Fig. 3；
Fig. 5 shows the exemplary block diagram of the display panel according to the embodiment of the present application；
Fig. 6 shows the exemplary block diagram of the display panel according to another embodiment of the application；
Fig. 7 shows the exemplary block diagram of the driving circuit applied to display panel according to the embodiment of the present application；
Fig. 8 shows the illustrative diagram of the driving circuit of Fig. 7；
Fig. 9 shows the example results frame of the driving circuit applied to display panel according to another embodiment of the application
Figure；
Figure 10 shows the illustrative diagram of the driving circuit of Fig. 9；
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to invention is illustrated only in attached drawing.
Unless otherwise defined, the technical term or scientific term that the disclosure uses should be tool in fields of the present invention
The ordinary meaning for thering is the personage of general technical ability to be understood." first ", " second " used in the disclosure and similar word are simultaneously
Any sequence, quantity or importance are not indicated, and are used only to distinguish different component parts." comprising " or "comprising" etc.
Similar word means that the element or object before the word occur covers the element or object for appearing in the word presented hereinafter
And its it is equivalent, and it is not excluded for other elements or object.The similar word such as " connection " or " connected " is not limited to physics
Or mechanical connection, but may include electrical connection, it is either direct or indirectly."upper", "lower",
"left", "right" etc. is only used for indicating relative positional relationship, and after the absolute position for being described object changes, then the relative position is closed
System may also correspondingly change.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 1, providing a kind of deformation unit for touch feedback, including substrate 11, the first supporting element 12, second
Supporting element 13, deformation part 14, first electrode 15 and second electrode 16,
Deformation part 14 is parallel to substrate 11, deformation part 14 and base between the first supporting element 12 and the second supporting element 16
It is air interlayer 17 between plate 11；
Under the action of the electric field that first electrode 15 and second electrode 16 are formed, deformation occurs for deformation part 14, deformation part 14
Using piezoelectric material.
The characteristic of the inverse piezoelectric effect of mechanical deformation occurs when applying voltage for the deformation part based on piezoelectric material of the application
(such as dotted portion) is applied to touch feedback field.Inverse piezoelectric effect herein refers to that polarization of dielectric direction applies electric field,
Dielectric just generates mechanically deform or mechanical pressure in a certain direction, when extra electric field removes, these deformations or stress also with
Disappearance.Here the electric field applied is alternating electric field.When first electrode 15 and second electrode 16 apply what different voltages were formed
Electric field, so that deformation part generates vibration.The amplitude of vibration frequency and vibration can be adjusted by changing electric field.First electrode 15 with
The voltage that second electrode 16 is applied is the identical pulse voltage of frequency.It should be noted that the thickness of air interlayer 17 should make
The vibration for obtaining deformation part is not exposed to substrate 11.The specific value of the thickness of air interlayer 17, is set according to actual conditions, here not
It limits.
Wherein, the setting position of first electrode and second electrode can use various ways, can be using level in substrate
Setting, can also using perpendicular to substrate setting.It is illustrated as follows in conjunction with Fig. 1 to Fig. 4.
Further, first electrode 15 is set to the first supporting element 12 close to the side of deformation part 14；
Second electrode 16 is set to the second supporting element 13 close to the side of deformation part 14.To pass through first electrode 15 and the
Two electrodes 16 form electric field around deformation part 14, so that deformation part 14 vibrates.Used deformation part 14 can at this time
Using Kynoar, (PVDF) Kynoar-trifluoro-ethylene (P (VDF-TrFE)), or use Kynoar-trifluoro
Chloro-trifluoroethylene (P (VDF-CTFE-TrFE)) ter-polymers piezoelectric material.
The electromechanical transformation of piezoelectric material is to be generated by certain size and the piezoelectric vibrator of shape in certain specified conditions
It vibrates to realize.There are many type of the vibration mode of piezoelectric vibrator.Here with beam mode.
As shown in Fig. 2, deformation part 14 can be contrary by two panels axial stretching piezoelectric vibrator 141 and piezoelectric vibrator 142
It constitutes.Piezoelectric vibrator 141 and piezoelectric vibrator 142 are stacked, electric when applying alternation in first electrode 15 and second electrode 16
When pressure, one piezoelectric vibrator is elongated and another shortens, will integrally bend vibration, as indicated by a broken line in fig. 1.It needs to illustrate
It is that length herein is the length D1 of deformation part.Wherein piezoelectric vibrator 141 and piezoelectric vibrator 142 are the vibration of axial stretching type piezoelectricity
Son.The vibration of axial stretching type is when applying alternating voltage on the length direction of piezoelectric vibrator, and length changes, in length
It is vibrated on direction.Axial stretching vibration also makes longitudinal extension vibrate.First electrode 15 and second electrode are used as shown in Figure 1
16 when the length direction of deformation part 14 forms electric field, and the length D2 of piezoelectric vibrator 141 or piezoelectric vibrator 142 will change.
Further, as shown in figure 3, first electrode 15 is set to side of the deformation part 14 far from substrate；
Second electrode 16 is set to substrate 11 close to the side of deformation part 14.To pass through first electrode 15 and second electrode
16 form electric field around deformation part 14, so that deformation part 14 vibrates.Used deformation part 14 can be used partially at this time
Vinyl fluoride-trifluoro-ethylene (P (VDF-TrFE)) piezoelectric material.
As shown in figure 4, deformation part 14 can be contrary by two panels transversal stretching piezoelectric vibrator 143 and piezoelectric vibrator 144
It constitutes.Piezoelectric vibrator 143 and piezoelectric vibrator 144 are stacked, electric when applying alternation in first electrode 15 and second electrode 16
When pressure, one piezoelectric vibrator is elongated and another shortens, will integrally bend vibration, as shown by dotted lines in figure 3.It needs to illustrate
It is that length herein is the length D2 of deformation part.Wherein piezoelectric vibrator 143 and piezoelectric vibrator 144 are the vibration of transversal stretching type piezoelectricity
Son.The vibration of transversal stretching type is when applying alternating voltage on the thickness direction of piezoelectric vibrator, and length changes, in length
It is vibrated on direction.Electricity is formed in the thickness direction of deformation part 14 using first electrode 15 and second electrode 16 as shown in Figure 3
When field, the length D2 of piezoelectric vibrator 143 or piezoelectric vibrator 144 will change.
A kind of display panel is also disclosed in the application, including substrate 20, backboard 21 and several being formed on backboard 21
Pixel unit 22 further includes the deformation unit that touch feedback is used for provided by each embodiment of several the application；
Deformation unit 10 is arranged in correspondingly on pixel unit 22.
In the identical situation of electric field frequency, when deformation part generates the vibration of same-amplitude, the deformation part of deformation unit
Area is bigger, and the voltage difference for the voltage that first electrode 15 and second electrode 16 are applied is bigger, and exponentially type increases.It is understood that
, for display panel of the same area, it is greater than using the voltage difference that a deformation unit is applied using two shapes
Become the sum of the voltage difference that unit is applied.Therefore, in order to obtain the effect of low-power consumption, using multiple deformation units, and deformation list
The area of member is contracted to pixel unit grade.In this way, reducing the electric energy of driving.Also, to be driven with pixel unit common sparing
Dynamic circuit resource provides possibility.
Further, as shown in Figure 5 and Figure 6, pixel unit 22 includes at least a glowing device 23, glowing device
Part 23 includes first electrode (not marking in figure) and second electrode 24；
Substrate of the second electrode 24 of electroluminescent device as deformation unit；
The second electrode of deformation unit and the second electrode 24 of electroluminescent device connect；
The first electrode of deformation unit connect 21 with backboard；
The second electrode of electroluminescent device is cathode.
At this point, the first electrode 15 of deformation unit obtains required driving voltage from backboard 21.Backboard 21 is provided with deformation
Driving circuit can provide driving voltage to second electrode 15, be detailed in the explanation of Fig. 7.It should be noted that shown in Fig. 5 and Fig. 6
The first electrode 15 of deformation unit and the cathode 24 of electroluminescent device between not being electrically connected, using in electroluminescent cell
The mode of via hole is set on the cathode 24 of part, the first electrode 15 of deformation unit may make to pass through the cathode of electroluminescent device
24.Part-structure is simplified in Fig. 5 and Fig. 6 in order to protrude connection relationship.
Wherein, what Fig. 5 was provided is the deformation unit application by Fig. 1 in the schematic diagram of display panel, and what Fig. 6 was provided is that will scheme
3 deformation unit application is in the schematic diagram of display surface.It should be noted that in Fig. 6 electroluminescent device 24 conduct of cathode
The second electrode of deformation unit, is not required to that the second electrode of deformation unit is separately provided, saves cost and processing step.
As shown in fig. 7, the application also provides a kind of driving circuit applied to display panel, display panel includes that pixel is driven
Dynamic circuit 104, further includes driving unit 101 and holding unit 102,
Driving unit 101 connect deformation unit where any electroluminescent device pixel-driving circuit 104, and with guarantor
The connection of unit 102 is held, when electroluminescent device is effective, electric energy is input to holding unit 102 by driving unit 101；
Holding unit 102 receives the electric energy that driving unit 101 is sent, and drives deformation unit deformation occurs.
The present embodiment, with include tri- electroluminescent devices of RGB as shown in Figure 5 or Figure 6 pixel unit display surface
It is illustrated for plate.The driving unit 101 of the driving circuit of deformation unit can connect any one electroluminescent device in RGB
Pixel-driving circuit.The deformation of piezoelectric material is related with voltage difference, unrelated with electric current.Therefore using holding unit to piezoresistive material
Material carries out driving and the holding of deformation posture.
Further, as shown in figure 8, driving unit includes deformation driving transistor T1, deformation drives the grid of transistor T1
The first electrode of electroluminescent device is connected, first electrode connects the first supply voltage VH, second electrode connection holding unit.
Further, holding unit includes that the first electrode connection deformation of the first storage capacitance C1, the first storage capacitance C1 is driven
The second electrode of dynamic transistor T1 and the first electrode of deformation unit, second electrode ground connection.
Further, pixel-driving circuit includes shine driving transistor T3, electroluminescent device D1 and the second storage capacitance
C2,
It shining and the grid of transistor T3 is driven to receive display data Vdd, first electrode is connect with second source voltage V, the
Two electrodes are connect with the first electrode of electroluminescent device D1；
The second electrode of electroluminescent device D1 is grounded；
The first electrode of second storage capacitance C2 is connect with the grid for the driving transistor T3 that shines, second electrode and electroluminescent hair
The first electrode of optical device D1 connects；
The first electrode of electroluminescent device D1 is connect with the grid for the driving transistor T1 that shines.
The working principle of driving circuit is as follows:
When deformation drives the grid of transistor T1 effective, deformation drives transistor T1 conducting, supply voltage VHIt is deposited to first
Storage holds C1 charging, and powers to the first electrode of deformation unit, so that corresponding deformation occurs for piezoelectric material.It needs to illustrate
It is that, when the line scan signals of the pixel unit are effective, display data just access to the grid for the driving transistor T3 that shines.It can
See, when the driving circuit of deformation unit is with pixel-driving circuit common sparing circuit, not only simplifies circuit complexity, and obtain
With the display data effect that deformation occurs.
As shown in figure 9, the application also provides a kind of driving circuit applied to display panel, including driving unit 201, guarantor
Unit 202 is held,
Driving unit 201 receives row scan data Gate and deformation data Data, and connect with holding unit 202, is expert at
When scanning signal Gate is effective, deformation data Data is input to holding unit 202；
Holding unit 202, receives the electric energy of driving unit 201, and drives deformation unit deformation occurs.
The driving circuit works independently, and needs to be separately provided line scan signals Gate, deformation data Data.
As shown in Figure 10, further, driving unit includes deformation driving transistor T1, and deformation drives the grid of transistor to connect
Line scan signals Gate is met, first electrode connects deformation signal Data, and second electrode connects holding unit.
Further, holding unit includes that the first electrode connection driving of the first storage capacitance C1, the first storage capacitance C1 is brilliant
The second electrode of body pipe T1 and the first electrode of deformation unit, second electrode ground connection.
The working principle of driving circuit is as follows:
When line scan signals Gate is effective, deformation drives transistor T1 conducting, and deformation data Data is to the first storage capacitance
C1 charging, and to the first electrode output voltage Vout of deformation unit, so that corresponding deformation occurs.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (12)
1. a kind of deformation unit for touch feedback, which is characterized in that the unit includes substrate, the first supporting element, second
Supporting element, deformation part, first electrode and second electrode,
The deformation part is parallel to the substrate, the deformation between first supporting element and second supporting element
It is air interlayer between part and the substrate；
Under the action of the electric field that the first electrode and second electrode are formed, deformation occurs for the deformation part, the deformation part
Using piezoelectric material.
2. the deformation unit according to claim 1 for touch feedback, which is characterized in that
The first electrode is set to first supporting element close to the side of the deformation part；
The second electrode is set to second supporting element close to the side of the deformation part.
3. the deformation unit according to claim 1 for touch feedback, which is characterized in that
The first electrode is set to the side of the deformation part far from the substrate；
The second electrode is set to the substrate close to the side of the deformation part.
4. a kind of display panel, including substrate, backboard and several pixel units being formed on the backboard, feature
It is, further includes any deformation unit for touch feedback of several claims 1-3；
The deformation unit is arranged in correspondingly on the pixel unit.
5. the display panel according to claim 4, which is characterized in that
The pixel unit includes at least a glowing device, and the glowing device includes first electrode and the second electricity
Pole；
Substrate of the second electrode of the electroluminescent device as the deformation unit；
The second electrode of the deformation unit is connect with the second electrode of the electroluminescent device；
The first electrode of the deformation unit is connect with the backboard
The second electrode of the electroluminescent device is cathode.
6. a kind of driving circuit applied to display panel, the display panel include pixel-driving circuit, which is characterized in that also
Including driving unit and holding unit,
The driving unit connects the pixel-driving circuit of any electroluminescent device where the deformation unit, and with it is described
Holding unit connection, when the electroluminescent device is effective, electric energy is input to holding unit by the driving unit；
The holding unit receives the electric energy that driving unit is sent, and drives deformation unit deformation occurs.
7. the driving circuit according to claim 6 applied to display panel, which is characterized in that
The driving unit includes deformation driving transistor, and the grid of the deformation driving transistor connects the electroluminescent cell
The first electrode of part, first electrode connect the first supply voltage, and second electrode connects the holding unit.
8. the driving circuit according to claim 6 applied to display panel, which is characterized in that the holding unit includes
First storage capacitance, the first electrode of first storage capacitance connect the second electrode of deformation driving transistor and described
The first electrode of deformation unit, second electrode ground connection.
9. the driving circuit according to claim 7 applied to display panel, which is characterized in that the pixel-driving circuit
Transistor, electroluminescent device and the second storage capacitance are driven including shining,
The grid of the luminous driving transistor receives display data, and first electrode is connect with second source voltage, second electrode
It is connect with the first electrode of electroluminescent device；
The second electrode of the electroluminescent device is grounded；
The first electrode of second storage capacitance is connect with the grid of the luminous driving transistor, second electrode and electroluminescent hair
The first electrode of optical device connects；
The first electrode of the electroluminescent device is connect with the grid of the luminous driving transistor.
10. a kind of driving circuit applied to display panel, which is characterized in that including driving unit, holding unit,
The driving unit receives row scan data and deformation data, and connect with the holding unit, believes when the row scans
When number effective, deformation data is input to holding unit；
The holding unit, receives the electric energy of driving unit, and drives deformation unit deformation occurs.
11. the driving circuit according to claim 10 applied to display panel, which is characterized in that
The driving unit includes deformation driving transistor, and the grid of the deformation driving transistor connects the row scanning letter
Number, first electrode connects deformation signal, and second electrode connects the holding unit.
12. the driving circuit according to claim 10 applied to display panel, which is characterized in that the holding unit packet
The first storage capacitance is included, the first electrode of first storage capacitance connects the second electrode and the shape of the driving transistor
Become the first electrode of unit, second electrode ground connection.
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| WO2023184298A1 (en) * | 2022-03-31 | 2023-10-05 | 京东方科技集团股份有限公司 | Piezoelectric sensor, driving method thereof and haptic feedback apparatus |
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